um: Don't trace irqflags during shutdown

In the main() code, we eventually enable signals just before
exec() or exit(), in order to to not have signals pending and
delivered *after* the exec().

I've observed SIGSEGV loops at this point, and the reason seems
to be the irqflags tracing; this makes sense as the kernel is
no longer really functional at this point. Since there's really
no reason to use unblock_signals_trace() here (I had just done
a global search & replace), use the plain unblock_signals() in
this case to avoid going into the no longer functional kernel.

Fixes: 0dafcbe128 ("um: Implement TRACE_IRQFLAGS_SUPPORT")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Johannes Berg 2019-09-17 13:20:14 +02:00 committed by Richard Weinberger
parent e472c64aa4
commit 5c1f33e2a0

View File

@ -170,7 +170,7 @@ int __init main(int argc, char **argv, char **envp)
* that they won't be delivered after the exec, when
* they are definitely not expected.
*/
unblock_signals_trace();
unblock_signals();
os_info("\n");
/* Reboot */